Corel CAD 2015 Upgrade - Download Packaging: Download Version: Upgrade Operating Systems Supported: Windows & Mac OS System Requirements: Windows: Microsoft Windows 8 or Windows 7 (32-bit or 64-bit editions) Intel Pentium 4 (2 GHz or faster) 2 GB RAM (4 GB or higher recommended) 500 MB hard disk space High Color (16-bit) graphics card (3D graphics accelerator card recommended) 1024 x 768 screen resolution (1280 x 800 recommended) Mouse or tablet CD-ROM drive for installation from CD Internet connection for product activation and access to the plug-in store Mac: Mac OS X v10.7 (Lion) - v10.10 (Yosemite) Intel processor 1 GB RAM (2 GB recommended) 500 MB hard disk space 1024 x 768 display (1280 x 800 recommended) with 16-bit video card Mouse or tablet CD-ROM drive for installation from CD Internet connection for product activation and access to the plu...